#include <iostream>
using namespace std;

int main()
{
	cout<<"Hello world!"<<endl;
	cout<<"How are you?"<<endl;
	cout<<"nice to see you"<<endl;
	cout<<"Nice to see you."<<endl;
	cout<<"ice to see you."<<endl;
	cout<<"ni hao"<<endl;
	cout<<"one line again"<<endl;
	/*for test*/
	return 0;
}
